Apparatus for the measurement by volume of delivered quantities of liquids



G. J. GIBBS June 25, 1935.

APPARATUS FOR THE MEASUREMENT BY VOLUME OF DELIVERED QUANTITIES OPLIQUIDS Filed Dec.

(I l I Patented June 25, 19 35 THE MEASUREMENT" BY ISIVERED--QUANTITIES-- OF Application December 1 4 Claims.

The present invention relates to apparatus for the measurement'by volumeof delivered quantities of' liquids and whilst applic to the-measurementof liquids, is of particular use inthe measurement of petrolwhendelivercd from {a portable" tank to the flxeditank. ofthepurchaser.v

Generally, garages and other suppliers of petrolv ihave their tankssupplied from a portable tank, 1 thequantity of petrol delivered fromthe portable tank beingmeasured'by a meter'in the pipe line between thetanks. As the portable'tank is generally above the purchasersflxed tankit happens the liquid: still flowing and J-thexpurchasefstank ondisconnection is often dound to be partially or'wholly full of petrolwith thel result thatquite apart' from the inac- .curacy du'e to thepassage. of air. through the volume of petrol in his-itank;

The object of the present invention is to overcome this difficulty asregards inaccuracy of measurement and accordingly the conduit betweenthe portable tank and the fixed tank is provided on the inlet side ofthe meter with a valve controllable by the level of liquid in anauxiliary chamber of the pipe line.

The invention is more particularly described with reference to theaccompanying drawing in which:

Figure 1 is an end elevation partly in section showing a tank wagon withthe device fitted thereto.

Figure 2 and 3 are sectional elevations of a control cock in twodifferent positions.

Figure 4 is a fragmentary sectional view of a modified form ofconstruction.

The tank I of a tank wagon of any usual form having an outlet pipe 2which may be provided with a stop cock 3 has connected thereto a chamher4 to the outlet of which a metering device 5 of any desired form isapplied. Fluid flowing from the metering device passes through stop cock6 to a flexible hose connection 1 adapted to be connected by a union 8to the inlet pipe 9 of a, storage tank ID.

The chamber 4 is divided by a partition I l into a float chamber and aliquid retaining chamber.

than has actually been received 9, 1934, Serial-N0. 758,324! I In-GreatBritain0ctober'5; 1933..

able generally thatimmediately-theportable tank 'is emptied and quid'haspassed throughv eter-"and' the purchasers i ,1. As 'a result, falsemeasurementnis'indicated on the meter; Again, the pipe between themetermeter, thefpurchaser'is debited with a greater The partition II has apassage providedwith'avalve seat I l 2 cooizie rating with a Ipivotedsval've member" I3 =connected to a float l4; re lease *port I 5is conn'ected by a stand! Ii to' some point on=the tank -above the'highestiliquid 5 level. Y The metering device 5 may be provided witl i'an indicator l'l'of anyusual iormi 'It-will be preferred that thestopcock -li a small 'air inletport a and its plu'g -l-9 lims an 10 airpassage so i that' when sufiicient liquidl passed from tank' I throughthemteflhgdevice i into tank l0 and -it'is then desired to disconnecttheflexible pipe "from .tlie' metering devicefithw cock B- onthechamber4 isturned ofl into the poi-*- 15 sition shown-in Fig-ure'lfi'; thiat aireaten the pipe =11 prior toor during-' tneuncouplingfofi the unionbetween pipe? I ofithe fluid 'inith'e pipe 1: fiowmg into tne tamz Nikandtliuszavoiding waste;

It will 'consequently tie-seen tnat witii therde vice accordingito' thepresent invention as: long asl liquid: is-ieither flowing through'cliamber' l en is present th'erein ab'ove a predetei'mined -level; thevalve 'l 3i will be open; b'ut: should the: suppiy a of? liquid" fail;thatc is -to sayi-thez tank: 11pm? empty, no flow of aircanzpsssithrough' tov op'ere ate the metering device 5 and give a falsereading on the indicator I! because the float valve I I 4 willautomatically close.

Figure 4 shows a modified form of construction which is designed toobviate the possibility that excessive liquid pressure in the chamber 4acting on the upper surface of the valve l3 may prevent the float M fromlifting the valve l3.

In this construction the float I4 is attached directly to a pilot valve2! which is adapted to close an aperture in the valve l3 and which ispivoted about the same axis 24 as the valve l3.

It will be appreciated that opening of the pilot valve 2| will allowliquid to pass into the space 22 to equalize the pressures on both facesof the valve 13.

The pilot valve 22 carries an extension piece or hook member 23 adaptedto engage the back of the valve l3 to open it, after the pilot valve hasopened by a predetermined amount, so as to provide for unobstructed flowof liquid to the meter.

I declare that what I claim is:--

l. Apparatus for the measurement by volume of quantities of liquiddelivered from a high level reservoir to a low level receptacle,comprising means for providing a float chamber and a liquid retainingchamber communicating therewith, a 55 PATENT; i

-andr ciiamber l teailow' I H conduit connecting a low point of saidreservoir with said float chamber, a meter communicating with saidretaining chamber, valve means for. closing communication between saidfloat chamber and said retaining chamber when the liquid in said floatchamber falls below a predetermined level whereby to prevent the passageof air to said meter, a float responsive to the liquid the'maximumliquid level in said reservoir so that reservoir can fill completelysaid liquid from the float chamber, and a discharge conduit connected tosaid meter for delivering the liquid to the-receptacles v 2. Apparatus'forthe measurement by volume of quantities of liquid delivered from ahigh level reservoir to a low level receptacle, comprising 1 means forproviding a float chamber and a liquid retaining chamber communicatingtherewith, a conduit connecting a low point of said reservoir with saidfloat chamber, a meter communicating with said retaining chamber, avalve for closing communication between said float chamber andsaidretaining chamber when the liquid in said floatchamber falls below apredetermined level wherebyto prevent the passage of air to said meter,a float responsive to the liquid level in said float chamber for openingsaid valve, an air escape conduit, extending from the upper said floatchamber to a point above the maximum liquid level in saidreservoirwhereby liquid from the reservoir can flll said float chambenadischarge conduit connected tosaid meter for de liveringthe liquid tosaidireceptacle, and valve means for closing communication from saidmeter to-said discharge conduit whereby to maintain the fllled conditionof said retaining chamber, saidvalve means including an air bleedervtopermit drainage 'of' said discharge conduit when said'valve means isclosed I part of 3. Apparatus for the measurement by volume.

of quantities of liquid delivered from a high level reservoir to a lowlevel receptacle, comprising means for providing a float chamber and aliquid retaining chamber communicating therewith, a

conduit connecting a low point of said reservoir with said floatchamber, a meter communicating with said retaining chamber, a pivotedvalve for closing communication between said float chamber and saidretaining chamber when the liquid in said float chamber falls below apredetermined level whereby to prevent the passage of "air to saidmeter, a float connected to said valve at apoint removed from its pivotpoint and responsive to the liquid level in said float chamber foropening said valve, an air escape conduit extending from the upper partof said float chamber to a point above the maximum liquid level in saidreservoir whereby liquid from the reservoir can flll said float chamber,and a discharge conduit connected to said meter for delivering theliquid to said receptacle.

4. Apparatus for measurement by volume oi quantities of liquid deliveredfrom a high level reservoir into a low level receptacle, comprisingmeans for? providing a float chamber and a liquid retaining chambercommunicating therewith, a conduit connecting a low point of said 7reservoir with said float chamber, a meter communicating with the top ofsaid retaining chamber, pivoted valve means for closing communicationbetween said float chamber and said retaining chamber when the liquid insaid float chamber -falls below a predetermined level whereby to preventthe passage of air to said meter, said valve meansincluding a valveplate and a pilotvalvehaving a common pivot point, a float connected tosaid pilot valve and responsive to the liquid level in said floatchamber for. opening said valve means, an air escape conduit extendingfrom the upper part of said float chamber to a point above the maximumliquid level insaid reservoir whereby liquid from the reservoir can flllsaid float chamber, and a.

discharge conduit connected to said meter for delivering the liquid tothe receptacle.

GEORGE JAMES, GIBBS.

